Château de Potelle was built around 1290 by Gilles de Mortagne. It has been looted and damaged in wars (1477, 1654, 1712 and 1793). The last restoration was made in 1817. The gate house was erected in the 13th-14th centuries and may have been located to the site of ancient Roman castrum. The chapel was moved to the courtyard of in 1519. Today Château de Potelle is a private home.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.